How to apply the xenomai kernel patch on debian?

I've been trying to install xenomai on debian and I'm confused about all the version numbers. I'm on Debian 6 (Linux debian 2.6.32-5-686 #1 SMP Tue May 13 16:33:32 UTC 2014 i686 GNU/Linux) Steps I followed, 1. installed the linux-patch-xenomai from apt via aptitude install linux-patch-xenomai 2. then according to /usr/share/doc/linux-patch-xenomai/README.Debian I need the kernel source. I got the kernel source via aptitude install linux-source-2.6 3. expand the source tree tar -xvf linux-source-2.6.32.tar.bz2 in /usr/src/ 4. then apply the patch as explained in the above README.Debian by /usr/src/kernel-patches/i386/apply/xenomai which fails 1 out of 4 hunks FAILED -- saving rejects to file arch/x86/kernel/process_64.c.rej 1 out of 6 hunks FAILED -- saving rejects to file arch/x86/mm/fault.c.rej 1 out of 15 hunks FAILED -- saving rejects to file kernel/sched.c.rej 1 out of 1 hunk FAILED -- saving rejects to file kernel/signal.c.rej Why is this failing even though the above README.Debian states This is intended for vanilla and Debian kernel sources? I know debian 6 is eol but any help is appreciated.